The state's civil code was altered from
defining marriage as a “union between a man and a woman for the
purpose of procreation” to “a union between two people with the
possibility of procreation or adoption.”

Gay couples can also marry in Mexico
City, where lawmakers approved a marriage law in 2009. Mexico City
is a federal district, not a state, much like the District of
Columbia. Such unions have also taken place in Quintana Roo, where
the state's civil code is gender neutral.